Arnaud Fenioux 's Personal Home Page


You will find here, everything related to computing.

pmacct / sfacct + influxdb + grafana

January 11, 2018 - Arnaud
Categorie: Technical

I spent a lot of time messing with all of this, that's why I deceided to share my notes.
My aim was to collect sFlow samples and to agregate them (sfacct), store them in a TSDB (influxDB) and graph network traffic (grafana).



Network Automation with PyEZ and Ansible on Junos

January 1, 2018 - Arnaud
Categorie: Technical
Tags: Juniper

Few months ago, I wrote a blog post regarding Network Automation with PyEZ and Ansible on Junos.

Original posts are available in French and English. The code is available on

IP squatting and SPAM

September 17, 2017 - Arnaud
Categorie: Technical

This is an article I wrote few months ago with a colleague (Jérôme Nicolle), it's about IP squatting (using BGP) and SPAM.

This article has been publised in MISC mag 89 in January 2017 (

Peer Me

December 1, 2016 - Arnaud
Categorie: Technical

I'm proud to show you PeerMe, the tool I wrote with two guys at Facebook during the RIPE hackathon in Madrid.

This tool with help you discovering and configuring new peerings on your equipents thanks to PeeringDB Data and EuroIX-json-schema provided by IXP.

LAN extention

November 4, 2016 - Arnaud
Categorie: Technical

This is an article I wrote few months ago with some colleagues, it's about L2 extentions (MPLS/VPLS/VXLAN/TRILL/SPB and LISP).

This article has been publised in MISC mag 84 in april 2016 (

FranceIX General meeting 2016

September 30, 2016 - Arnaud
Categorie: Technical

This is the presentation I made during the FranceIX General meeting 2016, reguarding the open-source tools we are using and an update about the route filtering on our route-servers (IRR and RPKI/ROA) :

Route Servers Features & security @RIPE72

May 30, 2016 - Arnaud
Categorie: Technical

This this the presentation I made in English at RIPE72, during the Connect Working Group,
Talking about Route Servers on IXP, and security that should be implemented.

FreeBsd Crypto

March 4, 2016 - Arnaud
Categorie: Technical
Tags: BSD

There are several way to make some crypto :

-  To create encrypted image jails, use the -c switch and either pass bde or eli and follow the instructions on screen:
ezjail-admin create -c eli -i 16G

Route Servers @FRnOG25

November 13, 2015 - Arnaud
Categorie: Technical

This is a very short (10-15 minutes) I made (in French) at FRnOG25 in Paris in November 2015.

Topic is about Route Servers at IXP (features, securities, filtering).

IS-IS tuning

July 3, 2015 - Arnaud
Categorie: Technical
Tags: cisco

Here is a sample configuration of ISIS for Cisco routers. This example is a level2 only zone (like a backbone area 0 in OSPF).

Note : Loopback addresses are (or should be) always configured with /32 netmask.
It's a good practice to dedicate a contiguous range for all your loopback addresses, this range is most of time the first of your supernet (i.e. your "big" network allocation), or the one with a zero.

Let's begin to create an loopback interface and annonce this IP (In this example we will use the first /24 of our "big" range for loopbacks) :


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